My cat would do that.
An Orange with a Skin on will Float- Air will be trapped inside the skin, but an Orange without the skin on, although lighter, has no air trapped, and will, in turn, sink.
An elephant has more skin than a mouse. The elephant is much larger in size, in proportion to a mouse.
SKIN
They are barbering, which is actually biting the hair off at the skin. They would have to either work it out themselves, as this is a show of dominance by the mouse doing the barbering, or you must separate them.
if you cover up your skin all the time , dirt would get trapped in between the clothes also , so would dead skin , this would cause infections and would breed dust mites , which would carry virus's, this dead skin and dirt would clog up your pours and would bury deep down and would cause skin cancer after a while.
Maybe gum disease or some food trapped.
SKIN
Mouse give you rabies without the skin being broken
Your mouse might have red flaky dots on his skin A)From dandruff B)from fleas C)From scratching
It is either to bright or you have a skin disease
Without mucus, your non-skin surfaces would dry out (and those cells would die), less dust would be trapped on the way to your lungs and so the incidence of infection would increase.
Can a red wasp leave one stinger in a number of places in the skin?